Near-infrared-absorbing glass, near-infrared-absorbing element having the same and image-sensing device

摘要

Provided are a near-infrared-absorbing glass having high transmittance in a visible light region, an excellent near infrared absorption property, excellent climate resistance, etc., and is suitable for use as/in a near-infrared-absorbing element such as a near-infrared-absorbing filter, and a near-infrared-absorbing element to which the above near-infrared-absorbing glass is applied, and the near-infrared-absorbing glass contains, by cationic %, 25 to 45% of P⁵⁺, 1 to 10% of Al³⁺, 15 to 30% of Li⁺, 0.1 to 10% of Mg²⁺, 0.1 to 20% of Ca²⁺, 0.1 to 20% of Sr²⁺, 0.1 to 20 Ba²⁺ and 1 to 8% of Cu²⁺ and contains, as anionic components, 25 to 50 anionic % of F^- and O^2-.